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Potato and Leek Soup in the Slow Cooker

I’ve always been a fan of potato and leek soup. Yet, as I got older (and wiser), I noticed that most restaurant versions of leek and potato soup were thick and creamy, which tasted great, but weren’t so good for the waistline.

I really wanted a healthy potato and leek soup for the slow cooker.

Slow cooker potato leek soup

I was also working nearly full time in my pediatric nutrition private practice, so I wanted a soup I could make in the morning and come home to, ready to eat.

Yup, a soup I could throw together in the morning and forget about until I returned home.

So I began my research.

My recipe criteria: a potato leek soup recipe I could make in the slow cooker, no cream (or cream optional), a short list of simple ingredients, and fast and easy to pull together.

Slow Cooker Potato and Leek Soup

What I came up with has stood the test of time and the sometimes picky palates of four kids.

This soup has been made so many times over the last 10 years, I cannot even count.

It is, by far, my most requested soup from my children and one of the easiest soup recipes to make.

I’m not kidding: My kids request this soup recipe all the time.

And they would tell you it’s the best soup they’ve eaten!

(And how many kids do you know who like potato leek soup?!)

They also love my Roasted Pork Shoulder in the Oven.

An Irresistible Slow Cooker Leek and Potato Soup

I’m pretty pleased for the obvious reason: my kids love this leek soup. But, I also love it because it’s an easy potato leek soup to make and it’s pretty healthy.

Making this soup is a quick production. Just chop up some potatoes and leeks, throw them in the slow cooker with chicken broth (or vegetable broth if you want a potato leek soup vegan option), and walk away. 

Yup.

Walk. Away.

When you make this recipe, you’ll find that most of the effort is in rinsing the leeks, which I do quickly in a bath of cold water after I’ve sliced them.

Here are some of my other favorite soups I like to make:

Simple Soup Ingredients = Fast Prep

This recipe is savory and comforting, and only uses three main ingredients: leeks, potato and broth.

Yes, I said that right. Only 3 ingredients.

Kind of like my rule for ingredients lists on food products: simple and succinct…and less than ten ingredients (all of which I can pronounce and recognize).

Or what I screen for when I’m looking through recipes. If it’s got more than 6 or 7 ingredients, I’m looking for something else.

When to Serve Leek and Potato Soup

Autumn and winter are the perfect times of year for this flavorful soup. Once fall rolls in and the school year and activities are in full swing, you can bet this recipe makes a regular appearance on my meal plan.

I make it on those really busy nights (read = driving all over town picking up and dropping off kids) when it’s nice to have something ready and waiting.

Or, when I have a full day of kiddos in my office.

With only a little washing and chopping, this leek soup recipe will be a star player in your slow cooker soup category.

What’s your favorite soup in the slow cooker?

potato leek soup in the slow cooker

Slow Cooker Potato Leek Soup

Yield: 6 servings
Prep Time: 15 minutes
Cook Time: 6 hours
Total Time: 6 hours 15 minutes

A low fat, hearty and delicious Potato Leek Soup prepared in the slow cooker.

Ingredients

  • 4 medium to large potatoes, peeled (I peel, but this is optional)
  • 2-3 leeks, sliced, white and light green parts only
  • 32 oz. chicken broth
  • kosher salt
  • pepper
  • Half-n-Half cream (optional)

Instructions

  1. Rinse, peel and cube the potatoes into 1" pieces.
  2. Slice the leeks and place in a bowl of water; swish them around to dislodge dirt and sand; let stand for 2-3 minutes (dirt/sand will sink to the bottom of the bowl).
  3. Add potatoes, leeks and chicken broth to the crock pot (in this order).
  4. Season with salt and pepper.
  5. Cook on low heat for 6 hours.
  6. Use an immersion blender or traditional blender to puree the soup.
  7. Check flavor and season to taste.
  8. Optional: If you like a creamier version, stir in 2 ounces of half-n-half cream.
Nutrition Information:
Yield: 6 Serving Size: 1 cup
Amount Per Serving: Calories: 140Total Fat: 1gSaturated Fat: 0gTrans Fat: 0gUnsaturated Fat: 0gCholesterol: 4mgSodium: 732mgCarbohydrates: 30gFiber: 3gSugar: 3gProtein: 5g

Nutrition information is an approximate value based on the ingredients available to the author at the time of creation.

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This post was originally published in 2013 | Updated in September 2020

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  1. Every year we have soup while my family does our Christmas decorating. This year we’re trying your soup that I discovered on pinterest. Thank you in advance!

  2. I did red potatoes, peeled & chopped 2 stalks leeks sliced and rinsed.THEN……i used Progresso Recipe Starters. yes, in the can. CreamyBasil Parmesan flavor. OMG!!! i had no milk or cream or chicken broth. i babysat this watering it down as needed til done. WOWZA!! SUPER. hubby ate the whole crockpot. i had 1 bowl with my book ….needless to say, its a versatile recipe. thanks guys for sharing and letting me share too 🙂

  3. Do you use baking potatoes? Could you use red potatoes instead? How much in weight do you need in potatoes?

  4. This is really simple. I’ll have to give it a try soon! What can I use in place of half-and-half if I still want a creamy texture? I never have any around the house, and probably wouldn’t buy some just for one recipe. Chili is my go-to slow cooker soup recipe.